## Power required to drive the compressor

hi
in jet engine power generated for two purpose
one is to drive the turbine, compressor and other accosseries
Second is for the forward jet thrust
take an example
A engine generates 15000 lb thrsut.
how to calculate the following power and mass flow
how much amount of power required to drive the compressor and to deliver the 15000 lb of thrust. how much amount air and fuel required to deliver 15000 lb thrust
 PhysOrg.com science news on PhysOrg.com >> New language discovery reveals linguistic insights>> US official: Solar plane to help ground energy use (Update)>> Four microphones, computer algorithm enough to produce 3-D model of simple, convex room
 This isnt a simply plug-and-chug calculation. You have tons of viscous losses that will make it extremely nasty to solve.
 Recognitions: Gold Member Jet engines operate on the Brayton cylce, which is the ideal cycle for gas-turbine engines. Actual gas-turbines are complex and involve intercooling, reheating, and regeneration. However, assuming the simple Brayton cycle is what you are asking about, first you need to determine the back-work ratio. The back-work ratio is the amount of power that the compressor will consume. That is calculated from the enthalpy difference between inlet and outlet of the compressor divided by the difference in enthaply between the inlet and outlet of the turbine. Before I go any further, do you have the inlet and outlet temperatures and the inlet and outlet pressures? Forgive me if it seems that I a taking the long way to the answer, but this is how I know to calculate the power output of a gas-turbine. Thanks Matt

Recognitions: